[ASSESSMENT OF POTENTIAL RISK FOR CONTAMINATION OF SURFACE WATER RESERVOIRS BY PATHOGENS OF HUMAN PARASITIC DISEASES].

Sanitary and parasitological studies of the waste effluents and surface reservoir waters were conducted in the south of Russia. The efficiency of purification of waste effluents from the pathogens of parasitic diseases was investigated in the region's sewage-purification facilities. The water of the surface water reservoirs was found to contain helminthic eggs and larvae and intestinal protozoan cysts because of the poor purification and disinfection of service fecal sewage waters.

[Efficiency of standard versus instrumental studies in detecting helminth eggs].

Testing confirmed that the applied brush washing methods developed in the 1970s could provide the adequate representativeness of a sample and full information on the actual presence of helminth eggs in the objects under study. An instrumental study was found to increase the probability of helminth egg detection by up to 3.1 times due to the representativeness of a sample, to reduce the labor- and time-consumption to have analysis results, as well as to unify a procedure for sanitary parasitological studies of washouts, and to enhance the efficiency of the equipment already used in parasitology laboratories.

[Results of parasitological passportization of sewage treatment works in the South Federal District].

Developed parasitological passports for sewage treatment works have been issued in the subjects of the Southern Federal District. Its some regions have areas inadequately covered by centralized water drainage. New waste treatment technologies and disinvasion agents have not been virtually introduced.

[The sanitary and parasitological characteristics of environmental objects in the south of Russia. Wastewaters and their precipitations].

The relative uniformity of helminthic eggs has been noted in the wastewaters of the Rostov Region, Krasnodar Territory, and the Republic ofAdygea. An ovogram is mainly presented by the eggs of Ascaris, Toxocaras, and whipworms. By taking into account incomplete dehelmintization during waste treatment, 5,000 to 1,080,000 helminth eggs may annually come into the water reservoirs where purified wastewaters are discharged, 33% remaining viable.